You should know that there are many Batei Dinin that do not consider Feta cheese to be hard cheese. I have enjoyed many fetas in South Africa, as over 70% of the feta cheese from there is kosher certified.

The cheeses are kosher certified and this was mislabelling. This happens very often in the industry. How often you see they put a stark and it is OU. I can personally vouch that the Feta cheese and yoghurts are of top class.